He began trying to save another victim before realising his own lad, a mechanic, had also been hurt.

Shocked Mr Jahan said: “I started CPR on my own son.

My face was covered in blood, my hands were covered in blood. Why, why? The guy who killed him drove directly into the crowd and killed three innocent guys.

“They were defending the community from all the problems going on around the country.”

But he pleaded for calm amid warnings of “retribution” attacks.

After an angry crowd of 300 gathered at Birmingham’s City Hospital, where the men died early yesterday, he pleaded: “It’s already bad enough what we are seeing without other people taking the law into their own hands.”

Witness Yasser Khan, 25, a cousin of Musavir, 31, and Shazad, 30, said he saw the car plough into the men.

He told how the brothers had decided to stay on and defend their mosque after rumours spread that looters were on their way.

Shazad, 30, was recently married and wife Khansa is four months pregnant.

Friends said the brothers’ shattered father had a heart attack when he was told about the tragedy.

A 32-year-old man arrested on suspicion of their murders was being questioned by police.

The tragedy came as trouble flared for a fourth night running.

David Cameron yesterday insisted the “fightback” was starting as London was finally brought under control by 16,000 police.

The Prime Minister has also given the OK for police to use water cannons on rioters.

After chairing another meeting of the Cobra emergency committee yesterday, he said: “Whatever tactics the police feel they need to employ, they will have legal backing.”

And he pledged a “more robust” response as 98% of Daily Star readers in our phone poll said looters should be shot.

More than a thousand people have been arrested, with courts working round the clock.

There was hope downpours predicted for Manchester and Liverpool would keep looters off the streets last night.

The widow of Pc Keith Blakelock, murdered in the 1985 Broadwater Farm riots in north London, condemned the carnage.

Elizabeth Johnson said: “The memories it brings back are terrible. This is needless vandalism, but people’s lives are at risk."